Difference between revisions of "Sega System 2"

From Sega Retro

m (Text replacement - " {{ref|" to "{{ref|")
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* Board composition: Main Board + [[ROM]] Board
 
* Board composition: Main Board + [[ROM]] Board
−
* [[RAM]]: 82 [[Byte|KB]], including 32.5 KB high-speed [[SRAM]] (Static RAM){{ref|https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp}}
+
* [[RAM]]: 32.5 [[Byte|KB]] [[SRAM]]{{ref|https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp}}
 
** Main: 4 KB
 
** Main: 4 KB
−
** [[VRAM|Video]]: 12 KB (4 KB video, 2 KB sprites, 2 KB palette, 4 KB collision)
+
** [[VRAM|Video]]: 13.5 KB (4 KB video, 2 KB sprite attributes, 1.5 KB sprite line buffers, 2 KB palette, 4 KB collision)
 
** Sound: 2 KB
 
** Sound: 2 KB
−
** MCU: 64 KB
 
 
* [[Tile Layer|Tilemap]] planes: 2 background layers (1 static, 1 scrolling), 8×8 tiles
 
* [[Tile Layer|Tilemap]] planes: 2 background layers (1 static, 1 scrolling), 8×8 tiles
 
** Tilemap sizes: 512×512 for scrolling plane, 256×256 for fixed plane{{ref|https://github.com/mamedev/mame/tree/master/src/mame/video/system1.cpp}}
 
** Tilemap sizes: 512×512 for scrolling plane, 256×256 for fixed plane{{ref|https://github.com/mamedev/mame/tree/master/src/mame/video/system1.cpp}}

Revision as of 02:38, 6 October 2016

System2 PCB.jpg
Sega System 2
Manufacturer: Sega
Release Date RRP Code

The Sega System 2 is an arcade platform introduced by Sega in 1985. It is a successor to the Sega System 1, though largely an upgrade, utilising the same Zilog Z80 CPU, sound chips, and Sega graphics chipset. The major upgrades of the System 2 are the addition of a ROM Board, faster RAM, and a larger 512×512 background scrolling plane.

The System 2 was supported alongside the System 1, with its last game being released in 1988.

Technical Specifications

See Sega System 1 Specifications for details on underlying System 1 specifications. The following are changes that System 2 made to System 1 specifications.

  • Board composition: Main Board + ROM Board
  • RAM: 32.5 KB SRAM[1]
    • Main: 4 KB
    • Video: 13.5 KB (4 KB video, 2 KB sprite attributes, 1.5 KB sprite line buffers, 2 KB palette, 4 KB collision)
    • Sound: 2 KB
  • Tilemap planes: 2 background layers (1 static, 1 scrolling), 8×8 tiles
    • Tilemap sizes: 512×512 for scrolling plane, 256×256 for fixed plane[2]

Gallery

  • PCB

List of Games

References

  1. ↑ https://github.com/mamedev/mame/blob/master/src/mame/drivers/system1.cpp
  2. ↑ https://github.com/mamedev/mame/tree/master/src/mame/video/system1.cpp


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